Auxiliary air supply and mixing device for internal-combustion engines



Feb. 25, 1930. G. AJBRUNELLE 1,748,203 AUXILIARY AIR SUPPLY AND MIXING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed July 1 1, 1926 3mm 64 arm/4, Bea/vs: L a

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Patented Feb. 25, 1930 f 'ip z iun'i ran "STATES" "ears-NT OFFICE eAsroN A. BRUNELLE, or sen. rnancrsco, cALIronnIA Application filed July 14,

My invention. relates to auxiliary devices adaptedto be interposedbetween a carburetor and the intake manifold of an internal-combustion enginefor supplying air to the explosive charge issuing from the carburetor and i for incorporating it therewith so as. to cause a properly diluted and vaporized mixture to be "delivered to the manifold;

EThe principalobject of my invention'is to p 10 produce a device of this character which thoroughly incorporates the air with the explosive --charge.zfrom the carburetor and causes themixture to be automatically delivered in corroot-combustible quality to the manifold at all speeds of the, engine.

i Another object of the invention is to providea device-adapted to minimize the liability to carbon deposits and to cause a smooth and virtually noiseless running of the engine.

Further objects of the invention are to produce a device, which issimple in construction and cheap to manufacture, and a device,

which can be easily attached, easilyassembled or disassembled, and has no parts liable to get-out of order.

A preferred embodiment of the invention is described in detail hereinafter and is illustrated in the accompanying drawings, in

.which 7 along the'line 33 in Figure 1;

Figure 4 is a bottom plan of the outer valve; Figure 5 is a bottom plan of the seat memher for the outer valve; and

Figure 6 is a horizontal section of the flange element, the view being taken-along the line 66 in Figure 3.

My. device as a whole is indicated in the drawings by the numeral 1 and consists of a flange element 2, which has bolt holes 3 therein,so that the element is adapted to be inter-' posed between the flanged outlet of a cari I rem-113v AIR SUPPLY ANDMIXING DEVICE i on INTERNAL-COMBUSTION ENGINES 1926. serialfne. 122,411.

buretor 42 and the flanged intake manifold 5 of aninternal-combustion engine and firmly bolted thereto by usual securing means 6. The

intake manifold 5 is provided with the usual throttle valve (not shown in the drawing).

and. provided with a passageway ,9 which leads from the interior of the extension and communicates with the opening 7, within which a baffle plate 10' of arcuate form, as is mostclearly shownin Figure 6, is secured to the flange element between the passageway 9 and the intake manifold, and the element is formed with a wall 11 sloping from the passageway toward the carburetor.

I A cylindrical valve housing12 having an upward, internally threaded extension 13 is secured to and below the flange element by means ofa nipple 14, screwed into the extension 8 and the extension 13, which has therein an aperture 15, so that thus the interior of the housing communicates with the opening 7 through the aperture, the nipple and the passageway 9. The valve housing is internally threaded and is adapted to have screwed therein amember 16 provided with a valveseat 17 and an interior wall 18, which extends from the 1 valve seat and forms through the member a passage 19 communieating with the; atmosphere, and in its outer or under side themember has radial slots 20 communicating with the passage.

' A va-lve'21, also provided with a valve seat 22, is normally adapted tobe seated on the seat 17 by gravity'andhas astem 23 extending through the member 16 in a spaced relation to th wall 18. The valve 21 is further provided with aninterior wall 24:, which ex tends from the seat 22 and forms through the valve and the stem another passage 25 communicating with the atmosphere. Upon the stem-23 and near the end thereof is secured a flange 26, and the end of the stem has therein radial slots 27 communicating with the'passage 25. t I A second .valve 28, normally adapted to be seated on the seat 22 by gravity, and provided with a stem 29, which extends through the valve 21 and is in a spaced relation tothe wall 24, may have the end of the stem threaded for securing thereon a nut 30, which is adapted to abut the end of the stein 23, for lim itingthe movement of the valve 28 relative to the valve 21. i

In operation, when the engine is running at a slow or a normal, predetermined speed, the valve 21 is lifted by the suction of the engine sufliciently to allow a current of air to pass through the passage 19 into the interior of the housing 12 and thence to the opening 7 and against the baffle plate 10, where it will be thoroughly incorporated'with the mixture of air and hydro-carbonvapors from the carburetor and whence it will be drawn there ber 16 and-allows air to pass throughthe slots 20 without lifting the valve 28 from its seat 22. As soon as this normal speed is ex-,

ceeded, the increased engine suction causes the valve 21 to belifted so that the flange 26 abuts the underside of the member 16 and also so that the valve 28 is lifted from its seat at the same time. If the suction is sufficiently increased, the-valve 28 will thusbe lifted until the nut 30'abuts the valve stem23. In this manner an additional air supply is caused to be drawn through the slots 27 and the valve passage 25 to the opening 7 and to be commingled with the combustible mixture from the carburetor, so that the mixture is thus thoroughly diluted and vaporized when it passes from the intake manifold to the enb It should be observed that, while the nut 30 limits the upward movement of the valve '28, the flange 26 limits the upward move ment of the valve 21,'and that the valves are returned to their respective seats by gravity so that my device is thus entirely automatic in its operation. In Figure 1 the flange elem'ent'2 is shown as secured between the flange at the side of the carburetor 4 and a corresponding side flange atthe intake manifold 5, but it is understood thatthe flange element may be secured in other positions, if so required, for connecting a carburetor with an intake manifold, and the device may otherwise be so modified in its construction as to adapt it'for use in connection with various makes of carburetorsand intake manifolds for various makes of internal-combus- "tion engines without departing from the openingtherethrough and adapted to be interposed between the outletof a carburetor and the intake manifold of an internal-combustion engine; a valve housing connected with the element and having its interior in communication with said opening; a member cating with said passage agravity actuated valve provided with a valve seat therein and i. i

normally adapted to. be seated on the seat in said member, said valve having a stem ex tending through the member in a spaced'relation' to said wall and being provided with a flange secured to the stem near the end thereof, and the valve also having an interior wall,

which extends from the seat in the valve and forms through thevalveand the stem an other passage communicating with the atmosphere, the end of the stem having slots therein communicating Vwith I the passage through the valve a second gravity actuated valve normally adapted to be seated on the vided with a stem, which extends through the first mentioned valve and is in a spaced relation to the interior wall thereof; and

means secured to the stem ofthe-second'valve seat in the first mentioned valve and pro- Y i and adapted to abut the stemof the first mentoo 

